Methanol → 2-amino-N-{2-[4-(4-chlorophenyl)-4-hydroxy-1-piperidinyl]ethyl}-4-fluorobenzamide dihydrochloride

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Reaction Steps

A mixture of 4.5 parts of N--{2-[4-(4-chlorophenyl)-4-hydroxy-1-piperidinyl]ethyl}-4-fluoro-2-nitrobenzamide, 40 parts of methanol and 90 parts of tetrahydrofuran is hydrogenated at normal pressure and at room temperature with 2 parts of Raney-nickel catalyst. After the calculated amount of hydrogen is taken up, the catalyst is filtered off and the filtrate is evaporated. The residue is converted into the hydrochloride salt in 2-propanol. The salt is filtered off and dried, yielding 2 parts of 2-amino-N-{2-[4-(4-chlorophenyl)-4-hydroxy-1-piperidinyl]ethyl}-4-fluorobenzamide dihydrochloride; mp. 210.7° C.

Provenance & Evidence